Roadlessland.org - Roadlessland.org provides interactive maps for all of the roadless
areas in the US along with thousands of photographs from the trail.
You can print topo maps from anywhere in the US, upload your
own photos and comments and get directions. Roadlessland is a
completely non-commercial site.

SierraBackpacker - Backpacking and mountaineering site for the Sierra Nevada & High Sierra, including Yosemite, Sequoia, and King's Canyon.
Everything for the backpacker from passes, trails, and destinations to books, gear, checklist, and weather.

Tahoe to Whitney - Guide to High Sierra Trails between Lake Tahoe and
Mount Whitney. Tahoe to Yosemite, Pacific Crest, and
John Muir Trails with maps, miles, elevations, side
routes, permits and resupply information.

The High Sierra Volunteer Trail Crew - We clear backpacking trails of winter-fall, and do maintenance of Sierra National Forest facilities, etc. It's free, and we feed you 3 meals a day. Some groups go in on mules 12 miles and hike out, and others work around the base camp. Family oriented, LOTS of fun, and someone else does all the cooking! Salmon on the grill, turkey cooked in Dutch ovens, etc. JOIN US!

Thru Hiker Calorie Counter - Website and Programs dedicated to taking the
guesswork out of planning your resupply points and
trail food. Also includes some excellent elevation
profiles of each of the Thru trails